18662225831 has 2 divisors, whose sum is σ = 18662225832. Its totient is φ = 18662225830.

The previous prime is 18662225801. The next prime is 18662225839. The reversal of 18662225831 is 13852226681.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 18662225831 - 2¹⁰ = 18662224807 is a prime.

It is a super-2 number, since 2×18662225831² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (18662225839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9331112915 + 9331112916.

It is an arithmetic number, because the mean of its divisors is an integer number (9331112916).

Almost surely, 2^18662225831 is an apocalyptic number.

18662225831 is a deficient number, since it is larger than the sum of its proper divisors (1).

18662225831 is an equidigital number, since it uses as much as digits as its factorization.

18662225831 is an evil number, because the sum of its binary digits is even.

The product of its digits is 276480, while the sum is 44.

The spelling of 18662225831 in words is "eighteen billion, six hundred sixty-two million, two hundred twenty-five thousand, eight hundred thirty-one".